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Zooz 700 Series Z-Wave Long Range Smart Relay ZEN51 | Installs Behind Wall Switch Or at The Light | Compatible with SmartThings, Hubitat, and Home Assistant | Z-Wave Hub Required (Sold Separately)

4.4 4.4 out of 5 stars 163 ratings
$32.95
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ZEN51 Single Relay
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Purchase options and add-ons

Connector Type Screw
Contact Material Copper
Contact Type Normally Open
Current Rating 1.5 Amps
Mounting Type Flush Mount

About this item

  • SMART RELAY FOR ON/OFF CONTROL: Install this relay to add Z-Wave to the existing wall switch and keep your favorite switch style and color. The relay output is dry contact for your unique applications outside of lighting but note the input (switch) requires 120 V which makes it perfect for 120 V signal monitoring on sump pumps or motion lights. For a dry contact input device, look up ZEN16.
  • 3-WAY COMPATIBLE: Unlike many other smart relays, you can use this device to automate 3-way set-ups as well. Even if you don't have neutral available at any of the switch boxes, you can always install this relay at the light fixture where you'll have access to power and neutral. Always follow the wiring diagrams carefully and make any programming changes if needed when installing this relay.
  • EASY INSTALLATION: Pigtail wires for convenient connections. Connect to mechanical on/off or momentary switches only (NO dimmers or electronic / smart switches). The relay is small enough to fit in the most crowded box, just 1.5" x 1.4" and 0.7" deep. NEUTRAL WIRE REQUIRED (check before buying). The device is ETL certified and conforms with North American safety standards.
  • SMART BULB MODE AND MORE: Bring back the switch function to your old switches even when using smart bulbs. The smart bulb mode allows you to control smart bulbs via Z-Wave without cutting power to them when off. Enjoy the new 700 series Z-Wave with powerful features like Z-Wave Long Range, SmartStart, and S2 authenticated security. Your hub or home automation softwarre needs to support this functionality as well.
  • HUB COMPATIBILITY: This is an advanced Z-Wave device and it requires an updated Z-Wave hub to display correctly. All Zooz devices work best with the Z-Box Hub. It was tested to work well with Hubitat, Home Assistant (Z-Wave JS), HomeSeer and is compatible with SmartThings. This product is backed by US based support from Zooz, 7 days a week and a 5-year warranty once registered.

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Product details

  • Product Dimensions ‏ : ‎ 1.5 x 1.4 x 0.7 inches; 1.76 ounces
  • Item model number ‏ : ‎ ZEN51
  • Date First Available ‏ : ‎ July 5, 2022
  • Manufacturer ‏ : ‎ Zooz
  • ASIN ‏ : ‎ B0B5VR87JX
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.4 4.4 out of 5 stars 163 ratings

Product Description

    NOTE: Check Wattage first: DON'T exceed 150 W of LEDs or 960 W incandescent. Use with small fans under 1/2 hp only. NEUTRAL WIRE REQUIRED.

      SPECIFICATIONS:
      • Model Number: ZEN51
      • Z-Wave Region: US/CA/MX
      • Power: 110-120 V AC, 60 Hz
      • 960 W incandescent, 150 W LED bulbs, 10 A resistive, 1/2 HP fan motors (don't use with tube lights or switched receptacles)
      • Z-Wave Range: Up to 300 feet line of sight (1300 feet with Z-Wave Long Range enabled)
      • Dimensions: 1.5" tall, 1.4" wide, 0.7" deep
      • Operating Temperature: 32-104° F (0-40° C)
      • Installation and Use: Indoor only


      Will it work with my smart speaker
      Smart speakers are not Z-Wave controllers so you will need a compatible Z-Wave hub to control this device with voice commands.
      Smart speaker compatible Z-Wave hubs include:
      • Z-Box Hub
      • compatible with SmartThings
      • Home Assistant (Z-Wave JS)
      • HomeSeer
      • Hubitat

      What's in the box

    • Smart Relay, User Manual

      • Looking for specific info?

      Customer reviews

      4.4 out of 5 stars
      4.4 out of 5
      163 global ratings

      Customers say

      Customers like the performance, ease of installation, simplicity, and size of the relay. For example, they mention it works well, it's easy to wire in, and the instructions are clear. Some appreciate the value. That said, opinions are mixed on pairing and resetting.

      AI-generated from the text of customer reviews

      29 customers mention23 positive6 negative

      Customers like the performance of the relay. For example, they say it works well with Hubitat, Home Assistant, and other Z-Wave devices. Some mention it's a useful device and works well in non-dimming lighting applications.

      "...This relay seems to work really well. I replaced a cheaper relay that failed. Bought another cheap relay that came shorted out of the box...." Read more

      "...with smartthings and with the new local mode they work well with external sensor automation drive...." Read more

      "...It works great and has been very reliable. Now when my alarm system is tripped all my lights are turned ON...." Read more

      "Zoos make reliable, cost effective devices, with good tech support." Read more

      21 customers mention19 positive2 negative

      Customers find the installation of the relay to be easy. They mention that it pairs easily, works as described, and is easy to wire in. They also appreciate the clear instructions. Some say that the product is a quick and easy way to interface First Alert with zwave.

      "...It seems very robust so far. It was easy to pair. When it says push 3 times quickly, boy it means quickly to put in pairing mode." Read more

      "...replacements for devices that are no longer supported, and they both installed perfectly. Will buy this item again if the need comes up." Read more

      "...This is a reasonably priced and easy enough to installed method of making your hardwired smoke detectors smart!..." Read more

      "...Lots of options for setup in Home Assistant, though this is a double-edged sword. Keep reading.The negatives:*..." Read more

      8 customers mention8 positive0 negative

      Customers find the relay very simple to install and use. They appreciate the clear wiring diagram and good tech support. Customers say they can easily name the two switches and change the switch type to toggle. They also mention that the relay has a number of methods of wiring up that can operate with an existing switch.

      "...Just a few more connections. Wiring diagram is very clear.Pro tip: critical to know the load and line terminals on the old switches...." Read more

      "Zoos make reliable, cost effective devices, with good tech support." Read more

      "...Very simple and pairing with Home Assistant is as quick and easy as it possibly could be. Full repeater as a mains-powered Z-Wave member...." Read more

      "Works perfectly. Easy to include in Smartthings network. Tech support is excellent. Very pleased with Zooz products." Read more

      7 customers mention7 positive0 negative

      Customers find the relay small and discreet. They say it fits in a switch box and is easy to fire.

      "Easy to fire and the size is ok for packing into a switch box. Big tip is to do a full reset before trying to pair the first time...." Read more

      "Let's start with the positives:* This thing is tiny. It packs two switch inputs and two relays where other manufacturers fit one*..." Read more

      "...It is quite tiny but nevertheless you'll want to use Wago connectors--BTW cheaper in bulk right here on Amazon...." Read more

      "...It is a small and discreet device that can be installed behind your existing wall switch or at the light fixture itself...." Read more

      6 customers mention6 positive0 negative

      Customers appreciate the value of the relay. They mention it's reliable, easy to install, and has an economical approach.

      "Just put in two, taking care of four switches. Much cheaper than using, as had been my habit, individual GE/Jasco z-wave switches...." Read more

      "...This is a reasonably priced and easy enough to installed method of making your hardwired smoke detectors smart!..." Read more

      "Zoos make reliable, cost effective devices, with good tech support." Read more

      "...The price is about 40% less than other Z-Wave double switches*..." Read more

      3 customers mention3 positive0 negative

      Customers find the relay easy to use. They mention that it triggers quickly when toggled from the light switch or Ring app, and responds instantly.

      "Easy to fire and the size is ok for packing into a switch box. Big tip is to do a full reset before trying to pair the first time...." Read more

      "...The device is small and triggers quickly when toggled from the light switch or Ring app...." Read more

      "...Connected up to Hubitat in seconds, and responds instantly." Read more

      6 customers mention3 positive3 negative

      Customers have mixed opinions about the pairing of the relay. Some mention that the pairing and device control was fast and flawless, while others say that it didn't pair with their SmartThings Z-Wave or SmartThinking Hub.

      "...These were super quick swaps for what I already had wired up. I like the integrated LED and button so you know what state the device is in to pair...." Read more

      "...great idea, fit in the box, but despite dozens of attempts, I could not get it to pair with my Smartthings Z-Wave Controller...." Read more

      "...site to the zwave hub/stick in an outdoor shed and pairing + device control was fast and flawless...." Read more

      "Somewhat difficult to pair, but afterwards works like a clock..." Read more

      3 customers mention0 positive3 negative

      Customers have issues with the ease of resetting the relay. They mention that it takes forever to hard reset, and that they did not push the switch rapidly enough. They also mention that there is a slight delay before the connection closes.

      "...Have to push 3x rapidly. If lights change, then did not push rapidly enough." Read more

      "...Toggling the switch you notice a slight delay before the connection closes and the light or fan comes in...." Read more

      "Twice now it’s lost power and takes forever to get it to hard reset so I’ve been unable to use the switch or z wave functionality for multiple days...." Read more

      Works perfectly!
      5 Stars
      Works perfectly!
      I was able to use these to control some high bay UFO lights through HomeAssistant. My lights are 1-10v dimming which had me concerned at first but these devices have a built in relay to be able to turn them off completely. Pairing was easy and I also installed some Zooz momentary switches to have physical control over them outside of HomeAssistant.
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      Top reviews from the United States

      Curtis R. Hibbert
      5.0 out of 5 stars Worth the money.
      Reviewed in the United States on March 15, 2024
      Style: ZEN51 Single RelayVerified Purchase
      I use this relay in Hubitat along with an advanced driver available to operate my overhead garage door opener. This relay seems to work really well. I replaced a cheaper relay that failed. Bought another cheap relay that came shorted out of the box. Just bit the bullet and got this one. It seems very robust so far. It was easy to pair. When it says push 3 times quickly, boy it means quickly to put in pairing mode.
      Helpful
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      Mike D S
      5.0 out of 5 stars I'm using 5 of these now with good results
      Reviewed in the United States on January 27, 2024
      Style: ZEN51 Single RelayVerified Purchase
      Easy to fire and the size is ok for packing into a switch box. Big tip is to do a full reset before trying to pair the first time. It seems like 50% of them pair immediately and the rest need to be reset first and then pair right away. Overall these are my go to for standard light switching.

      I'm using these with smartthings and with the new local mode they work well with external sensor automation drive. I'm using several with contact sensors to have automatic pantry and closet lights that come on when the door opens.
      Helpful
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      WBS
      5.0 out of 5 stars Reasonably easy to install, economical approach.
      Reviewed in the United States on February 4, 2024
      Style: ZEN52 Double RelayVerified Purchase
      Just put in two, taking care of four switches. Much cheaper than using, as had been my habit, individual GE/Jasco z-wave switches.

      If you have had occasion to replace a kaput light switch, you have what is required to install these. Just a few more connections. Wiring diagram is very clear.

      Pro tip: critical to know the load and line terminals on the old switches. So, turn off power to the switches, pull then out so connections are accessible. Then, power on and use a VOM set to test AC. Touch one lead to ground and, sequentially, the other to the two poles of a switch. Line will show 120V, load will show zero. Repeat for other switch as installation, at least in my house, can be inconsistent. Don’t forget to power down at the relay box before proceeding.

      Paired to a Hubitat C-8 Pro. I used the inclusion button on the device to pair. Have to push 3x rapidly. If lights change, then did not push rapidly enough.
      Helpful
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      Roger M.
      4.0 out of 5 stars Great module but…
      Reviewed in the United States on June 1, 2023
      Style: ZEN51 Single RelayVerified Purchase
      I recently changed all my lights to ZWave to reduce the WiFi pollution in my home. I needed a ZWave module to use as a trigger for an automation when my Vista20P alarm is tripped. This is not a direct interface but I was able to use a small relay module between the alarm and the zwave module. It works great and has been very reliable. Now when my alarm system is tripped all my lights are turned ON.

      Instead of having a terminal block with screws, the Zooz modules have short wire pigtails that you must solder to. This is a little unhandled but not a big deal if you have the tools and skill set.

      Update: After only a few months of service the switch input has failed. It’s still connected and controllable by SmartThings or by the button on the module but nothing happens when the external switch (relay) is closed. I’ve checked it thoroughly and the failure is internal to the Zooz module. This may be indicative of a deficiency in the module design but for now I’m going to attribute it to infant mortality and buy another one. I’ll update again if I have another failure.

      Update: The new unit stopped working. I noticed it on 3-19-2023. I did some testing and found that the module was connected to the hub and could be controlled by the SmartThings app and by the button but not by the external switch input. I was about to remove the module and install a new one when I remembered that I had a quick power failure recently. With this in mind I cycled the utility power to that circuit and that restored normal operation. It’s good that I didn’t have to remove the module and wire in a new one but troubling that a utility brownout can cause the external switch input to become unusable. Now if I want this function to be reliable when I’m away from home, I’ll have to create a way to cycle utility power to this circuit remotely. Good to know the answer but…
      4 people found this helpful
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      Retired Old Guy
      5.0 out of 5 stars Easy to install and add to system
      Reviewed in the United States on March 27, 2024
      Style: ZEN51 Single RelayVerified Purchase
      This is the second of these I have purchased as replacements for devices that are no longer supported, and they both installed perfectly. Will buy this item again if the need comes up.
      Helpful
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      Jesse
      5.0 out of 5 stars Works with Hubitat!
      Reviewed in the United States on January 11, 2024
      Style: ZEN55 DC Signal SensorVerified Purchase
      I needed to find the right device driver, but was quickly up and running. Tested Smoke and Carbon Monoxide, both reporting quickly and accurately. This is a reasonably priced and easy enough to installed method of making your hardwired smoke detectors smart!

      My main worry will be reliability and understanding if/when the sensor has an issue.
      One person found this helpful
      Helpful
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      RDR
      5.0 out of 5 stars Good Value & Reliable
      Reviewed in the United States on February 10, 2024
      Style: ZEN52 Double RelayVerified Purchase
      Zoos make reliable, cost effective devices, with good tech support.
      Helpful
       Report

      Top reviews from other countries

      Translate all reviews to English
      Luis C.
      5.0 out of 5 stars Pequeño, fácil de configurar y confiable
      Reviewed in Mexico on January 14, 2023
      Style: ZEN52 Double RelayVerified Purchase
      Este módulo es más pequeño de lo que imaginaba, así que cupo perfectamente en la caja de conexiones que tengo. Lo uso para controlar dos grupos de lámparas LED de manera independiente mediante el software Home Assistant (home-assistant.io) integrándolo con un módulo Z-Wave Nortek HUSBZB-1 (https://www.amazon.com.mx/GoControl-CECOMINOD016164-Lineal-husbzb-1/dp/B01GJ826F8/).

      Me permite controlar las luces tanto con los switches mecánicos que ya tenía instalados como con el Home Assistant.
      Customer image
      Luis C.
      5.0 out of 5 stars Pequeño, fácil de configurar y confiable
      Reviewed in Mexico on January 14, 2023
      Este módulo es más pequeño de lo que imaginaba, así que cupo perfectamente en la caja de conexiones que tengo. Lo uso para controlar dos grupos de lámparas LED de manera independiente mediante el software Home Assistant (home-assistant.io) integrándolo con un módulo Z-Wave Nortek HUSBZB-1 (https://www.amazon.com.mx/GoControl-CECOMINOD016164-Lineal-husbzb-1/dp/B01GJ826F8/).

      Me permite controlar las luces tanto con los switches mecánicos que ya tenía instalados como con el Home Assistant.
      Images in this review
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      Nicolas Vitaterna
      5.0 out of 5 stars It Just Works
      Reviewed in Canada on January 8, 2023
      Style: ZEN51 Single RelayVerified Purchase
      Great smart relay that seems to be one of the only ones that are actually certified to be used in Canada. Works great with Home Assistant and Zooz appears to be very welcoming to third party tools/integrations.
      Customer image
      Nicolas Vitaterna
      5.0 out of 5 stars It Just Works
      Reviewed in Canada on January 8, 2023
      Great smart relay that seems to be one of the only ones that are actually certified to be used in Canada. Works great with Home Assistant and Zooz appears to be very welcoming to third party tools/integrations.
      Images in this review
      Customer image
      Customer image
      3 people found this helpful
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      Chris R.
      5.0 out of 5 stars Unacceptable delay when using physical switch (resolved)
      Reviewed in Canada on October 26, 2023
      Style: ZEN52 Double RelayVerified Purchase
      Edit: FIRMWARE UPDATE. There is a firmware update which resolves the issue and now it is perfect and I love it, updated to 5 stars but I'll leave this review up just in case someone else runs into the same thing

      Original review:
      This relay is ok - it works, but when using the physical switch there is a jarring delay between when you hit the switch and when the light turns on - like a full second...when controlling the relay via zwave it is instant though. When I bought this relay I just wanted to make my existing switches smarter, not impede/sacrifice normal use for the tech. I know many zwave switches deliberately have a delay to allow for scene control via double clicks or whatever, and often it can be disabled, but that does not seem to be the case here...I can't find any way to disable it.

      Also, be aware, all the images seem to very purposely not show you how deep this relay actually is (they show height/width, but not depth) - it was much deeper than I expected, and it was a fair amount of work to get it to fit into even a relatively empty box.

      Over-all I'm pretty disappointed tbh, and I will likely be returning it.
      One person found this helpful
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      d656
      5.0 out of 5 stars Works well with a ceiling fan
      Reviewed in Canada on July 2, 2023
      Style: ZEN52 Double RelayVerified Purchase
      I purchased this relay to use with a ceiling fan to be able to control the light and fan separately. I installed it and paired it with SmartThings. The installation was simple. I like the fact that you only need a single neutral wire. It works well so far. I highly recommend this relay.
      One person found this helpful
       Report
      Kev Ontario, Canada
      4.0 out of 5 stars Crazy hard to include with Hubitat, once that was done, it works very well.
      Reviewed in Canada on November 30, 2022
      Style: ZEN51 Single RelayVerified Purchase
      Adding this device to my Z-Wave network was crazy hard. Hubitat Hub (latest FW and like 15 feet from the relay) would not detect it. I did factory resets, exclusions multiple times, dozens of inclusions, all of which failled. It finally worked for no apparent reason I can tell. Once installed however, it works very well. The manual relay works very quickly. That doesn't require inclusion so worked well right from the start. Once included in my Z-Wave network, automations are very quick as well, though slightly delayed compared to the manual relay (as you would expect). Assuming I have no more Z-Wave network issues, it will serve very well to automate my stairs light were the neutral wire is at the light and not at the switch.
      Report